SQL多行数据分组后合并某个字段

转载 ：https://www.cnblogs.com/DONET-LC/p/14510440.html

--多行数据分组后合并某个字段
declare @tabs table(tId int,name nvarchar(10))
 
insert @tabs values
(1,'linda'),
(1,'salar'),
(2,'mom'),
(2,'cc')
 
select tId,
stuff(
  (select '、'+name from @tabs where tId = t.tId for xml path('')),1,1,''
) staffIds
from @tabs t group by tId

Mysq可以使用另一个方法

select DepartId,group_concat(UserName separator '_') from m_users group by m_users.DepartId;